/*
XPTracker - Alternative Agile Tracking Tool
Copyright (C) 2006-2009  Stephen Starkey

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
*/
package org.xptracker.inject;

import com.google.inject.AbstractModule;
import com.google.inject.TypeLiteral;
import com.google.inject.name.Names;
import org.apache.commons.lang.StringUtils;
import org.apache.commons.logging.LogFactory;
import org.xptracker.services.auth.Authenticator;
import static org.xptracker.util.UserConfigBase.*;
import org.xptracker.util.UserConfigString;
import org.xptracker.util.UserConfigStringList;

import java.util.List;

public class AuthModule extends AbstractModule {
  protected void configure() {
    bind(String.class).annotatedWith(Names.named("ldap-host")).toProvider(new UserConfigString(PROPS_FILE, LDAP_HOST, ""));
    bind(new TypeLiteral<List<String>>() {}).annotatedWith(Names.named("ldap-dn")).toProvider(
        new UserConfigStringList(PROPS_FILE, LDAP_BASEDN));

    String authClassStr = new UserConfigString(PROPS_FILE, AUTH_TYPE, "").get();
    if (StringUtils.isNotEmpty(authClassStr)) {
      try {
        //noinspection unchecked
        Class<? extends Authenticator> authClass = (Class<Authenticator>) Class.forName(authClassStr);
        bind(Authenticator.class).to(authClass);
      } catch (ClassNotFoundException e) {
        LogFactory.getLog(getClass()).error(
            "Unable to find specified auth type: " + authClassStr + ".  Reverting to default authentication.", e);
      }
    }
  }
}
